[sylpheed:35635] Support for "Mail-Copies-To:" header?

[Wolfgang Keller]

Hello,

I could not find a way to add a "Mail-Copies-To:" header (with the
"never" value, of course) to my usenet messages to avoid getting those
annoying dis-"courtesy" copies:

http://www.newsreaders.com/misc/mail-copies-to.html

TIA,

Sincerely,

Wolfgang